Shedding light on dark DNA Most textbook definitions of evolution state that it occurs in two stages: mutation followed by natural selection. DNA mutation is a common and continuous process, and occurs completely at random.
The average adult only eats 15 grams of fiber per day. Women need 25 grams of fiber per day, and men need 38 grams per day, according to the Institute of Medicine.
Most Americans eat only 15 grams of dietary fiber a day, according to MedlinePlus.com, which is almost half of what they should be eating. The USDA Dietary Guidelines for Americans 2010 recommends that women aim for over 25 grams of fiber a day, while most men should shoot for 38 grams. In the 2001 Howarth Review, an additional 14 grams per day of fiber for more than 2 days is associated with a 10 percent decrease in calories and body weight loss of 1.9 kilograms over 3.8 months. Mechanism. Fiber helps you lose weight because it is satiating.